What is the standard deviation of the numbers 3, 7, 10, 15, and 20?
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Math question: "What is the vertex form equation of a quadratic function that opens upwards, has a vertex at (3, -2), and passes through the point (1, 10)?"
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Question: In a right triangle with angle A, if the sin(A) = 0.6, what is the cos(A)?